Inside a Jetaway 315: Deatiled Transmission Teardown and Inspection. (Complete Disassembly).

This video is a detailed teardown of a *1957 Cadillac Jetaway 315 transmission* by *Hiram* from the Automatic Transmission YouTube channel. Hiram begins by removing the external components, including the transmission cooler lines, extension housing, and speedometer housing. He then proceeds to disassemble the transmission, showcasing the various internal parts and their functions.

Here are some of the key components covered:

*Fluid Coupler:* This early transmission features a fluid coupler, a precursor to the modern torque converter. Hiram points out the lack of a stator in this unit and explains the differences between a fluid coupler and a torque converter.
*Governor:* The Jetaway 315 uses a governor to control shifting. Hiram highlights the importance of a properly functioning governor for smooth gear changes.
*Secondary Fluid Pump:* This transmission has a secondary fluid pump that allows for push-starting the vehicle, a feature common in older automatic transmissions.
*Bands and Clutches:* Hiram examines the condition of the transmission bands and clutches, noting significant wear and metal debris, indicating potential issues with lubrication and component failure.
*Pump:* The video provides a close-up look at the pump, which shows significant wear and grooving. Hiram explains how this wear can lead to performance problems and the importance of replacing worn bushings to maintain proper alignment and prevent leakage.
*Bushings:* Hiram emphasizes the crucial role of bushings in maintaining proper alignment and reducing wear on transmission components. He stresses the need to replace worn bushings during a rebuild for optimal performance and longevity.

The video concludes with Hiram's plan to further inspect and rebuild the transmission, addressing the issues discovered during the teardown. He also encourages viewers to subscribe to his channel for future videos on transmission tear downs, rebuilds, diagnostics, and common failures.


This is a teardown of a Hydramatic Jetaway 315 Transmission of a 1957 Cadillac.